Howard earl hoover



H. E. HOOVER.

BAG' FOR sucnoN swEEPERs.

APPLICATION FILED APLZ, ISIS- 1,380;907. Patented June 11921.@

2 SHEETS-sheep?.`

UNITED STATES HOWARD EARL HOOVER, ory CHICAGO; ILLINOIS, AssIGNoR To Tim HoovnnsUoTIoN sWIiEIEa OOMIJANY, OF NEW BERLIN, OHIO, Av coRIfORATIoNoF omo.

BAG FOR. sUoTIoN-swiinrnas tion cleaners which are adapted to catch the f dust or dirt broughtinto the ycleaner by the' dust laden air and` hold it while permitting the escape of the air itself..` vIt must be understood that these dirt bags are very im'- portant parts of the machine. If the bag is,L

too thin the air gets out but thedust comes with it and this is objectionable. If the bag is too thick or impervious thedust does not escape but neither does the air and the air' is backed up and Lback pressure isy created.

This decreases the renovating value of the apparatus because it' reduces the volume of air drawn through the carpet and also decreases tlie dirt liftingcapacity. It Vis very important to have a dust bag of the right size, shape and material so that it will catch all the dirt and will let out the air but they bag must also be durable else it willL soon' develop holes and let streams of dust'laden airescape. In the past bagsof this kind in which a blast of dirt-ladenair isv projectedL by a fan were madey with an Vopen mouth smaller than the cross sectional 'area ofthe bag.` This mouth isconneoted on to the bag by first making a cylindrical bag, thatend of which is near the open' mouth is of double thickness, then folding this double thickness on to each other, and sewing` theml together.

This gives a stiff', rigid and heavy neck sur? rounding the intake. Air cannot pass freely through even a double thickness of cloth.

The bag is hard to sew because so many layl ers of cloth impede the operation ofthe needie.A It is hard'to fastenin' position about y the'sleeve whichforms the open mouth because' of-its stiffness and bulkiness, and it is* not a symmetrical smooth well roundedjob.

I propose to takel a single ysheetfof cloth' which may or mayfiiot be treated andbe dust impervious, and to cutfit in such a man` ner that when the cutedgGS, are sewn to gether7 I will have a bag-cylindrical for a large part of its length buty tapered down on one side to and-provided with awide open mouth. Thelower tapered portion of the specination of Letters raient.' ky,Pa"jlin-f`1"June 7,19214 v, Application filed April 27, 1918. Serial No. 231,245. :1 .1.;

bag will have a reinforcement preferably in?! ysidey and of they same cloth as the baggan'dy this reinforcement willige kback far enoughA so that all hardv abrasive ydirt kparticles ythrown back into the ba'g'by the fan will kbe caught on it and not by the body ofthe bag itself: The result is most of the bagis of one thickness and so has "ai large air-'dis1 persing capacity..l Only asmall partl ofthe bag is ottwothicknesses and only that part .is oftwo thicknesses which needs reinforcing)k f It must be and that the whole interior ofthe bag is coated with dust deposited by this dust laden-` laden'air will if they -impingeupon the'nOr-f mal bag wall exert a hammer blow effect sufficient to drive the'dust previously 'A del storn@ in mind amiga@ auf :drivesgiii a largekvolume yof dust'laden air posited through thebag and thencei-iitovthe room. Forfthis reason it is important that the reinforcing be so'arranged that it takes' the direct blow of anyfdirt-particlesfasthey. kare thrown in by the fan;L 4

f The reinforcing part which is thus struck, I have shown preferably inside ofthe bag and it will be made preferably of rejected bag inateijialfthatis material which had holes in it or something of that kind. How# ever, under somey c'irvcumstances'it might .bel desirablefto have' the reinforcing outside ofy they bag and the reinforcement might be of,

some other kindofmaterial. vrFor instance,` yit might be made of material which did not show the dirt as clearly'as the normal bagf material, that is toy say,k if you use a lightk *gray bag you might want to have'the lower lportion ofy it, ythat part which comes nearest the floor made ofkhaki color or black as `it would notshow soi-l Vor stain if it ,dragged made of, nomatter what color it is, ne matez yter where it' is,'it must be understood that it" operates to protect the'bag from'wearing out `asaboveindicated so that there will, not ,beVE

lon the floor but no lmatter what material this reinforcing strip or floor or bottom ioo The bag itself is so shaped that itintlates n properly and makes a handsome sightly dust receptacle.` Among the objects of my invention,y therefore, are to provide a bag which will perform all the requirements above set out which will be of the type above indicated and to provide an economical process of manufacturing such a bag. Another object is to provide means for salvagiug scrap material which cannot be used in the bag in its original form, but by cutting may7 be used. Other objects will appear from time to time in the specification.

My invention is illustrated more or less diagrammatically `in the Aaccompanying drawings wherein- Figure 1 is a side eleva-tion of a suction sweeper with my bag in place;

F ig.V 2 is an end view of the bag;

Fig. 3 is a section on line 3 3 of Fig. 2;

Fig.y 4 is a section on line 4 4 of Fig. l;

Fig. 5 is a pat-tern of the main bag section on a reduced scale before it is sewn;

Fig. 6 is a front elevation of the bag ring about which the open mouth of the bag is secured; p

Fig. 7 is a section along the line 7 7 of Fig. 6.

ike parts are indicated by like characters in all the ligures. .Y

A is a suction cleaner containing a motor, fanand brush. A power conducting cable not hererillustrated conducts the electric current throughthe switch to the motor and it may be controlled by the operator. A1 is a f handle bail pivoted'on the suction cleaner.v

A2 is a handle rod connected to the handle bail. A3 is a guide bracket associated with the handle rod and adapted to have slidably mounted thereon a hook A4 which engages 'the loop D3 in the end cf the dust bag l.

The dust bag B is closed everywhere except at its lower intake end. Thererit has a wide' open mouth B1 in which is inserted a bag ring B2. The flange of this bag ring is provide-d with hooks B3 adapted to be engaged b y thumb screws B6l to hold the open mouth of the bag in register with the discharge from the fan. The open mouth of the bag is held on the sleeve of the bag` ring B2 by means of a clamping ring B4 on the outside of the fabricvof the bag. The sleeve of the bag ring is onV the inside. The clampy ing ring is tightened to hold the parts to- 1V gether. ATo make assurance doubly sure the open mouth ofthe bag is preferably surrounded by a thin, fiexible ineXtensible ring B5 which isenfolded Vin the fabric of the bag. This ring I make preferably of rolled soft paper. It might be made of string or of thread or merely an additional Vfold of the fabric of the bag, or even of wire kor any othermaterial and. it lits over the bag ring sleeve and is clamped in position and cannot bedrawn 01H11@ Sleeve because it would have to be drawn between the sleeve and the clamping ring, and this is manifestly impossible.

C is a flat piece of cloth. It is the blank which has been cut and the sewing up of which will form and shape the bag. At one end are two angular indentations C1 C1. These' when sewed together form the seams C202 one onV either side of the bag. C3 C3 locity of the air current, this reinforcementA may be carried up farther and fartherso as to make sure that few if any dirt particles fly freely through the air and strike the wall of the bag outside of the reinforc-k ing Zone. When thefseams C2 C2 have been sewn up, the reinforcing members having Y previously been sewed along the lines CA1 C4,

the blank lis rolled together so that the line C, C7, C8 and thel line C9, C10, C11 come .together. They are then sewn to form the seam C12. This sewing of course is done with the bag turned inside out. This forms a cylindrical bag except at one end where it is tapered'off on a kind of a bias, and the bag is open at both ends. The large end is closed by a round end which I will now describe.

The head or end of the bag may be made of one piece cut round if desired and sewny into the end of the bag as indicated7 but eX- perience shows that there 1s a certain amount of Vwaste cloth because a thread may have been dropped in lits manufacture leaving a small air hole through which dust and dirt cairget out, and no matter how great care is taken there is always a possibility that pieces withA such defects may get in. When this happens. these pieces are cut up into two sections D D1, each of them a little more than a semi-circle. These pieces are so small that it is easy to cut them from the defective cloth without including any of the defective parts. These pieces are Ythen laid one on the other as shownrin Fig. 2 and sewn together along the lines D2 D2. This gives us ay flat round head orend with a double reinforcing strip across the middle. This reinforcing strip' distributes'the load on the bag. When tension is exerted on the loopk atY the end thereof a single thickness may vpull outV and certainly would be likely to provide air leaks. L double thickness is not so likely to be pulledV out. piece;V them it is necessary7 to Sew a special re- If the bag end .is made of one inforcing strip diametrically across the bag end so as to get the same double thickness reinforcement effect. The holding or handle loop D3 is then sewnr in place at the center and the head is sewed into the bag. The reinforcing head is then folded into thematerial at the open mouth end. This is sewed up, and the bag is then turned right side out and mounted on the bag'ring. VThe result is the bag shown in Fig. 1.

It will be evident that while I have shown in my drawings an operative device, still many changes might be made both in size,

shape and arrangement of parts without de-.

along "the lines C", C7, C8, and C", C1",

C11 to form theseam C12. The head D made either of one or two pieces as the case may be is then sewn along the line C6, C". This work is a'll done with the bag inside out and all preferably with a double needle machine. This double needle machine or at least a double seam is of importance. Experience shows that if you have a single seam when you have tension on the bag the thread or threads joining the seam will cause holes and pulling out or expandingl of some of the meshes of the cloth and dust laden air will escape. seam appears to take the tension, the other seam appears to hold the flaps o r edges together so as to prevent leakage between the sewn parts, also this second interior seam which does not carry any tension stopsr fraying or unraveling of the edges of the cloth and insures a permanent continuous cloth edge in which the holding seam is located.

This edge extends between the two seams` Starting with When you have a double seam onel and is sufficient to ymake it impossible for the tension supporting seam to be separated from the cloth.

The bag having been completed, a single needlemachinemay be used to` sew in the reinforcing. ring B5 though a double needle machine maybe used for that purpose also if-jdesired, though owing to its complication `and the fact that it is not needed ordinarily,

a single seam machine yis used for that pur-p pose. y y

1. Asa new article of manufacture, a dust bag for suction sweepers having a substantially straight or untapered upper margin and a tapered lower margin, the cross section of vthe bag near the mouth being much smallerthan the cross section of the bag near the other end whereby the necessary eX-V pansion ofair near the mouth is provided Yfor and thesolid materials carried by the air are deposited on the inner lower surface of the bag adjacent the mouth, and a patch lining for reinforcingthe bag on such lower surface.

bag k'forsuction sweepers comprising a substantially cylindrical body with means for 2. As a new article of manufacture adustV supporting it at its outer end, a mouth with moans for attachment to the sweeperfand, inl termediate the body and mouth, a neck of a gradually diminishing cross section from the body toward the mouth formed` by a substantially straight upper surface and a correspondingly extended tapered lower surface whereby the necessary expansion of air is providedfor and the solid heavy ma-v terialscarried by the air are deposited on the latter surface, and a patch lining for reinforcing the bag on such lower surface. In testimony whereof, I affix my signature in the presence of two witnesses this 22nd day of `April 1918.- I

HOWARD- EARL HOOVER..

i Witnesses: y

Y MARIAN L. INGRAHAM,

kMINNIEM. LINDENAU.

soL n 

